Hello, I'm Danny.
I would not advise using any type of sealant. The area where you describe the leak is where the fuel pump mounts inside the fuel tank and where all the fuel lines connect to the fuel pump. The fuel lines are a press on connection. It might just be the plastic clip that holds the connection in place that is leaking or the line itself. I've attached a picture below of where the lines connect to the pump. Hope this helps and thanks for using 2CarPros.
Thursday, September 26th, 2019 AT 3:47 PM